Answer:
cos60⁰=3/y
y×cos60⁰=3
y=3/cos60⁰
y=3/0.5
y=6
y²=x²+3²
6²=x²+3²
36=x²+9
x²=36-9
x²=27
x=square root of 27
x=5.19
The answer is a
Step-by-step explanation:
18/100
1/10 = 10/100
10 + 8 = 18
1.5 hrs